Mechanism for preparing watch pivots and staffs



Aug. 11, 1925.

- s. RATINSKY MECHANISM FOR PREPARING WATCH PIVOTS AND STAFFS 2 Sheets-Sheet 1 Filed April 16 1921 Jw z.

Aug. 11, 1925.

S. RATINSKY MECHANISM FOR PREPARING WATCH PIVOTS AND STAFFS Filed April 16, 1921 2 Sheets-Sheet 2 I WE NToR flff/ filoman Zah'nsir Patented Aug. ll, i925.

earner SOLOMON BATINSKY, OF LONDON, ENGLAND.

MECHANISM F03 PREPARING Application filed April 16,

To all whom it may concern:

Be it known that l, SOLOMON RATINSKY. a citizen of the Russian Republic, residing at London, in the Kingdom of England, have invented new and useful Improvements in and Relating to Mechanism for Preparing lVatch Pivots and Staffs, of which the following is a specification.

This invention relates to improvements in watch-makers lathes, applicable in particular to the manufacture of pivots and staffs for clocks and watches, its object being to combine in a single apparatus, means for boring holes, for turning down with a burin or like tool and for polishing purposes. all this being performed in two operations. The holding of the file in the hand against the pivot, a delicate operation which necessitates a specialist, and leads to frequent breaking of the pivot being obviated.

According to this invention the pivot is held in the machine until the entire process of filing, smoothing, and polishing, is completed, the file acting automatically against the pivot and filing it to exact dimension. An indicator on a dial is set for a particular size of pivot and means are provided to prevent same from being filed any further.

The invention is shown on the drawings, wherein:

Figure 1 is a front elevation, Fig. 2 a plan, 'Fig. 3 a side elevation looking from the driving gear, Fig. 4 is a side elevation from the opposite end of the machine (left). Fig. 5 shows a detail.

Fig. 6 shows aside view of a boring attachment.

Fig. 7 is a graduated dial with an indica-tor for particular size of pivots.

Fig. 8 is a table-plate for screwing on the boring attachment.

Fig. 9 is a front support of the boring at tachment.

The machine is mounted on a base 1 having a support 2 integral with a bed-plate 3 on which can slide a table 4- through the intervention of an adjusting screw 5 engaging in a threaded bearing 6. The plate 3 has depending brackets 7 providing journals for a shaft 8. A spur wheel 7 a drives cog wheel 8 mounted on a shaft 9 carrying a chuck 10 for holding the pivot. Shaft 9 may also carry a pulley 11 when power drive is desired.

The brackets 7 also provide journals for W'ATGH PIVOTS AND STAFFS.

1921. Serial No. 462,026.

a spindle 12 fitted with lever 13 which upon depression causes an arm 15, secured to an arm 16 on a pivoted lever 17 to lower the file 18 out of contact wit-h the. pivot.

The shaft 8 at one end carries a slotted crank arm 19 through the slot of which passes a pin 20 secured by a screw 21 by which adjustment can be obtained. The pin 20 passes through a bearing 22 at the end of arm 23 connected to lever 17 by a fork 24 fitted with a pin 25. The lever 17 is pivoted at its lower end to the support 2 and 2 and has a spring 26 secured to it about midway at 2", the. other end thereof being attached to a projecting arm 27 on arm 16.

Lever 17 is bent as at 17 whereby arm 16 can be carried conveniently. The arm 16 forms a bearing mounted on a pin pivotally connected to the top of lever 17 and carries a bracket 28 in which is mounted an adjusting screw 29 connected to a hand 30 moving over a dial 31. The screw 29 passes through a bracket 32 to which is fitted a carrier arm 33. When the screw 29 is adjusted it moves the bracket 32 along the screw threads thereby raising or lowering the carrier 33. Carrier arm 33 can also move laterally on the screw 29 and carries a. holder 35 for the file which is secured in place by a screw 3 1. The holder can be adjusted laterally by a screw 36 and vertically for fine adjustment of the file againstthe pivot by a screw 37.

The file carrier and holder can be entirely turnedaside at right angles by releasing the springpressed stud 3 8.

In order that the pivoted lever 17 shall not be actuated when the gear 7 8 is rotated, the shaft 8 passes through the bearing 39 and is screw-threaded at the end to receive the nut 40. When the latter is loose, the wheel 7 with the integral bearing 39 can turn loosely on shaft 8 without revolving the latter. In this case however wheel 7 drives the cog 8 and shaft9 so that other operations can be performed on the lathe.

For instance the boringtool shown at Fig. 6 can be fitted on the table a and can serve for boring holes in staffs or wheels of watches in which the pivot has snapped.

41 is a bolt for holding the appliances onto the table 4 and has pins 42 to keep the same firm. 4:3 is a guide rod having a spring d4; tending to press Sai l'bd to the right.

Sleeves 45, 46 are carried on the rod 43 and have projecting lever arms 45, 46. 47 is a face plate at the end of rod 43 against which a wheel of a. watch can be placed and held by the neck member 48. A second spring is mounted between the arm 46 and face plate 47 to press the latter to the right. Arms 46 and 45 are fixed to the rod 43 but arm 45 with its sleeve 45 is slidable on said rod.

49 is an indicator to show how far the drill has bored. In action, spring 44 presses the wheel to be bored against the drill in the chuck 10 and also presses the face plate 47 against the wheel to be drilled. The arm 45 serves to prevent wobbling.

When operation is completed arm 45 is drawn back, to the left thereby also drawing back arm 46 until it contacts with the support 50. Upon further pulling on arm 45 rod 43 is pulled against spring 46 so that the face plate 47 is clear of the hook 448 and watch wheel can be readily removed.

The invention is to be used. in practice as follows: The drilling attachment is first fixed to the main machine by means of a bolt 41 on table 4 and the two pins 42 are fitted into the two perforations 42 .shown in sketch.

The hook 48 is pressed back from the face plate 47 allowing the watch wheel to come into position for drilling, the watch wheel to be drilled. taking up a position between face plate 47 and the hooked extremity of rod 43. The staff of the watch wheel slides into perforation which is in the hooked extremity of rod 43; perforation in hooked extremity is larger at one end than at the other. The staff of the wheel to be repaired enters through the larger end of the perforation slides down until it reaches the narrowest point of the perforation thus ensuring the drill entering the exact centre of the staff. The drill is next put into posi tion with the working end in the perforation. The idle end of the drill is fixed into the chuck 10 (Fig. 1). Spring 44 presses the staff to be bored against the drill: thus, when the drill has entered some distance into the staff the indicator moves along, the graduated plate showing the depth of the boring, and a second spring presses the watch staff to the face plate.

When the operation is completed, guiderod 43 is drawn away from drill and the watch wheel and drill removed, when the hole is bored, a piece of wire is put in the staff of the watch and it is fixed in chuck 10, and file 18 is put inthe file holder 35.

The file mechanism is then moved to table 4, where the chuck 10 with the watch staff is placed, and nut 40 is screwed on so that the mechanism of the driving wheels and the crank mechanism should be connected. As described in the specification and in the claims, it is necessary when boring holes or carrying out other operations, that the crank and the file mechanism is stopped. Then the wheels alone go without revolv ing file mechanism. This is carried on with nut 40. here nut 40 is turned left ways the wheels alone go and where it is turned rightways it becomes connected with the crank, which drives the file we have on.

Screw 5 is then turned around, which is fixed to table 4 and the file is brought as close to the watch wheel as is necessary. lVhen the screw 29 is turned around by the head, the hand 30 is shifted from its place on the dial 31, and the hand is put on a specific number, as described in the claims according to the desired thickness of the pivot.

Then the handle (of the main machine) turns the spur-wheel 7 which is connected to shaft 8. At the end of the shaft 8 is a slotted crank arm, 19, which carries fork 24 and lever 17, to which is connected the file holder 35. The whole mechanism is in motion and drives the file forwards and backwards against the pivot which is screwed in chuck 10 which is driven by the spur-wheel 7 through the cog 8 and the chuck 10 revolving with the pivot on the top of the file so that the pivot may be seen when at work. utes and the pivot is ready from the file alone. It is not necessary to engrave with a cutting tool as in old machines.

The lathe is instead of the three well known tools used by watch makers. One is for engraving with the cutting tool, the second is for polishing with the file, and the third is for boring holes, and thus the lathe of mine, possesses all the three qualities.

In the three tools generally used there is more work with the hand than with any machine and it is necessary to be an expert in using these but with my tool even an apprentice can use it properly, because the tool itself does the whole job.

Claims. i i

1. In a lathe of the class described, a frame having a bed-plate thereon, a table plate slidably mounted thereon, a rotatable chuck carrying spindle mounted at one end of the table plate, means for rotating said spindle, a reciprocable file holder mounted near the chuck, and means for reciprocating said file holder.

2. In a machine of the class described, a frame, a bed-plate mounted thereon, a tableplate on the bed plate, a rotatable chuck carrying spindle on the table-plate, a filing mechanism mounted near the chuck comprising a bent lever pivoting to the frame, a bracket on said lever carrying a graduated dial, a screw rotatably mounted in the bracket and carrying a pointer to co-operate with the dial, a reciprocable file carrier actu- It only takes 2 or 3 min-- ated by the screw means for operating the file carrier and yieldable means for holding the file carrier against the work.

3. In a machine of the class described, a frame, a bed-plate mounted thereon, a tableplate on the bed-plate, a rotatable chuck carrying spindle on the table-plate, a filing mechanism mounted near the chuck comprising a bent lever pivoted to the frame, a bracket on said lever carrying a graduated dial, a screw rotatably mounted in the bracket and carrying an indicator to co-operate with the dial, a reciprocable file carrier actuated by the screw, two parts in said carrier, two screws in top part and two slots in second part, means for regulating and straightening the file against the pivot in all directions.

4. In a machine ofthe class described, a frame, a bed-plate mounted thereon, a tableplate on the bed-plate, a rotatable chuck carrying spindle on the tableplate, a filing mechanism mounted near the chuck comprising a bent lever pivoted to the frame, a bracket on said lever, an arm on said bracket, a spring attached on said projecting arm, a projecting screw on said spring attached to the lever, means for raising and lowering on said lever according to the pressure of the file against the pivot that is desired, a second spring secured on said lever and securing device therefor arranged for turning aside at right angles the file mechanism for other operations as shown and described.

5. In a lathe of the class described, a frame, a bed-plate mounted thereon, two brackets on said bed-plate, a shaft mounted in said brackets, a slotted crank on said shaft an adjusting screw secured on said crank, means for regulating the travel of the file against the pivot longer and shorter, and a fork mounted on. said crank and actuated to cooperate with the lever and file carrier as described.

6. In a machine of the class described, a frame, a bed-plate mounted thereon, two brackets on said bed-plate, a shaft mounted in said brackets, a slotted crank on said shaft, an adjusting screw secured on said crank, a fork mounted on said crank, and actuated to cooperate with the lever and file carrier, a spindle in the brackets, a lever on said spindle, means to lower the file out of contact with the pivot, a spur wheel mounted on the shaft, means for driving the cog and spindle with chuck, a nut secured on said spur wheel and means for disconnecting the file mechanism from the chuck mechanism for other operations as shown and described.

7. In a machine of the class described, the combination with a drilling attachment comprising a guide rod, a spring on said rod, two sleeves fixed to projections, a hook, a wheel on said hook, a second spring to press the watch wheel to the plate, an indicator to show how far the drill has bored, two slots in support-plate, and two lever arms on said guide rod, means for pressing and acting said rod against the drill, a bolt secured on the support and two pins on front support and means for holding the drill attachment on to the table of the machine.

SOLOMON RATIN SKY. 

